Portable battery for head mount display device



FIG. 1 is a perspective view of a portable battery for head mountdisplay device showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a reference view thereof showing the state that the subjectdesign can be attached to the head mount display device;

FIG. 9 is a reference view thereof showing an example of the usage ofthe subject design in a condition that the subject design has beenattached to the head mount display device; and,

FIG. 10 is a reference view thereof showing an example of the usage ofthe subject design in a condition that the subject design has beendetached from the head mount display device.

The broken lines in FIG. 8, FIG. 9 and FIG. 10 show environmentalstructure only and form no part of the claimed design.

CLAIM The ornamental design for a portable battery for head mountdisplay device, as shown and described.